CVE-2023-53800High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: ubi: Fix use-after-free when volume resizing failed There is an use-after-free problem reported by KASAN: ===========================================================…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
ubi: Fix use-after-free when volume resizing failed
BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi] Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735
CPU: 2 PID: 4735 Comm: ubirsvol Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_report+0x171/0x472 kasan_report+0xad/0x130 ubi_eba_copy_table+0x11f/0x1c0 [ubi] ubi_resize_volume+0x4f9/0xbc0 [ubi] ubi_cdev_ioctl+0x701/0x1850 [ubi] __x64_sys_ioctl+0x11d/0x170 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK>
When ubi_change_vtbl_record() returns an error in ubi_resize_volume(), "new_eba_tbl" will be freed on error handing path, but it is holded by "vol->eba_tbl" in ubi_eba_replace_table(). It means that the liftcycle of "vol->eba_tbl" and "vol" are different, so when resizing volume in next time, it causing an use-after-free fault.
Fix it by not freeing "new_eba_tbl" after it replaced in ubi_eba_replace_table(), while will be freed in next volume resizing.
Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < bf9875aa7f7d624a8c084425b14bf7e5907ebc30Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < bf795ebbb9995e2fe7945de71177f01c2f1215dcLinux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 9c8be1f165baee53b5a36ea0b3c9281d403a1d0bLinux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 35f8d4064e54c18424db2997059d4c0b1d13d093Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 53818746e549e61841428892a8d94344494be797Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < b0c951742348d216f094d16ed4f70ae73db881c0Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 3d6378f7056ac7350338f941001162a8f660853cLinux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 9af31d6ec1a4be4caab2550096c6bd2ba8fba472Linux 2.6.22Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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